Randomly sort people into the Experimental or Placebo groups, without letting them know which pill they received.

Give all participants both pills.

Give the pill to people with high blood glucose and low blood glucose.

Keep the participant identities hidden from the experimenters permanently.

Blindfold the participants while they take the pills.

An experiment in which neither the test subjects nor the researchers know who is receiving the treatment and who is receiving the placebo

An experiment in which test subjects know which therapy they are receiving, but researchers are unaware

An experiment in which researchers know which therapy test subjects are receiving, but test subjects are unaware

An experiment in which both test subjects and researchers are aware of who is receiving the treatment and who is receiving the placebo

None of these are an example of a double blind experiment

Serving the samples to the taster in their usual containers.

Removing or covering up the labels on the cans or bottles.

Randomizing the placement of the cola samples.

Making sure the test administrator also does not know the brand of each sample until after the test.

Filling the sample cups the same way.

Give one group of people the actual pill and one group a placebo, but don't tell the participants which pill they are receiving.

Give all participants the actual pill and measure nail growth.

Give all participants the placebo pill and measure nail growth.

Give half participants the placebo pill and tell them they had the actual pill, and give the rest the actual pill but tell them they have the placebo pill.

This test cannot be done as a blind study.

Two of the answers are correct

An experiment in which the researchers and test subjects are aware of who is receiving a placebo and who is receiving a therapy.

An experiment in which the researchers and test subjects are unaware of who is receiving a placebo and who is receiving a therapy.

An experiment in which the researchers are aware of who is receiving a placebo and who is receiving a therapy, but the test subjects are unaware.

An experiment in which the test subjects are aware of who is receiving a placebo and who is receiving a therapy, but the researchers are unaware.